Wednesday, 2016-05-18

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mithroCarlFK: ping?00:59
CarlFKmithro: pong00:59
mithroCarlFK: did you get a pack of colorful microusb cables?00:59
CarlFKyes, I was wondering how that happened01:00
mithroCarlFK: do you have a photo01:02
CarlFKamazingly...  yes01:02
mithrocr1901_modern: ping?01:40
mithroCarlFK: I was looking for some colorful USB cables to tell all my dev boards apart when connecting / disconnecting them01:40
CarlFKmithro: these would be good for that01:48
mithroI need to find similar ones for mini-usb01:49
CarlFKthey may be a little short01:49
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cr1901_modernmithro: pong. Testing the counter now... verified up to 120MHz. It is NOT suitable for very low frequency signals, just as a warning :P08:29
cr1901_modernmithro: Verified up to 240 MHz. I'll try using one of Xilinx PLL's to go up even further08:32
cr1901_modern(I was synthesizing the test signal using IceStick)08:32
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mithrocr1901_modern: How low can you go?08:34
cr1901_modernmithro: Not sure... I do know 10.0/4.0 Hz is out of the question :P08:36
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cr1901_modernNow 264 MHz08:47
cr1901_modernmithro: What's the highest and lowest freq you think you'll need?08:47
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mithroIf it goes as low as 10MHz, then that is fine09:07
mithrocr1901_modern: have you tried measuring actual HDMI clock signals?09:07
cr1901_modernmithro: Not yet. Is the target enabled upstream yet?09:11
cr1901_modernmithro: What I'm doing right now is building against minispartan_base and adding some firmware to report the current frequency when asked (the current firmware has a "log events" command)09:12
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mithrocr1901_modern: I think it's upstream...09:19
cr1901_modernAnd right now I'm getting a clock domain Key Error because of course I am...09:19
mithroby "upstream" do you mean the HDMI2USB misoc firmware?09:19
tpbTitle: HDMI2USB-misoc-firmware/ at master · timvideos/HDMI2USB-misoc-firmware · GitHub (at
mithroThat only does HDMIOut09:20
cr1901_modernmithro: is it enabled in the Makefile is what I meant09:20
mithroshould be?09:22
tpbTitle: HDMI2USB-misoc-firmware/Makefile at master · timvideos/HDMI2USB-misoc-firmware · GitHub (at
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cr1901_modernmithro: Okay very good then :P. I'll start testing against video once I get base up and running.09:23
mithrocr1901_modern: that only does output as I said09:23
cr1901_modernSo? I can test the output clock to verify lol09:23
mithroWe are interested in using it to understand the HDMI clock frequency, so needs to test HDMI input09:24
cr1901_modernIf you want me to add input I will, but I'll need to buy a DisplayPort to HDMI adapter09:25
cr1901_modernmithro: Erm disregard that second part XD. I have one.09:26
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CarlFKmithro: one of my Atlys comes with a VmodMIB  "provides four additional Pmod and four additional HDMI connections."12:41
tpbTitle: VmodMIB: VHDC Module Interface Board - Digilent (at
CarlFKwhat's a Pmod?12:42
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tpbTitle: Let me google that for you (at
tpbTitle: Let me bing that for you (at
mithroha I thought that was going to "search on bing, don't find anything, type same thing into google" :P14:29
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tumbleweedmithro: we're now about a month away from needing this board to work. Should I be trying to buy one of xfxf's spare boards?21:02
tumbleweedand yes, we have an atlys to fall back to. But it's different (which is annoying for volunteers) and hard to make as robust21:09
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